JPH0651421B2 - Plate-making printing method and device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a plate-making printing apparatus provided with a plate-making device and a printing device, and more particularly to a plate-making operation and a printing operation that can be executed simultaneously.

(B) Conventional Technology Although a conventional plate-making printing apparatus is provided with a plate-making means and a printing means, as described in, for example, JP-A-47-13106 and JP-A-59-7082. In each of these devices, the plate making means and the printing means are separately operated in time series.

That is, when the original image is formed on the stencil sheet, only the plate making unit operates, and when printing on the sheet, only the printing unit operates.

Further, as a printing apparatus provided with a base paper storage section between the printing means and the plate-making means, the one described in Japanese Utility Model Publication No. 59-169960 has been proposed.

(C) Problems to be Solved by the Invention As described above, in the conventional technique, only one of the means operates even though one device is provided with the plate making means and the printing means. It is a thing. Therefore, the platemaking time and the printing time do not overlap with each other, and their total time becomes the total printing time. If you want to print several hundred sheets or more per sheet, the plate-making time accounts for a small proportion of the total printing time, which is not a big problem, but prints about 20 to 30 sheets per sheet. In this case, the proportion of plate making time is relatively large.

Assuming that the time required to make one original is 25 seconds and the time required to print on one sheet is 0.5 seconds, the total printing time will be calculated when printing one original on 500 sheets. Is 25+
It becomes 500 x 0.5 = 275 (seconds). Therefore, the ratio of plate making time is 25/275 = 0.09, which is only 9%.
Nothing more than. However, when printing one original on 50 sheets, the total printing time is 25 + 50 x 0.5 = 50 (seconds), and the ratio of platemaking time is 25/50 / 0.5. Time and print time are equal.

By the way, in recent years, due to a reduction in printing cost and an improvement in printing quality, a rotary copying machine is being increasingly used instead of an electronic copying machine, and accordingly, an opportunity to print various kinds of small quantities is increasing.

Therefore, in some cases, one original image may be printed on 20 sheets of paper, and in such a case, the plate-making time occupies an unusually large proportion of about 70%.

Therefore, when the number of printed sheets for one original decreases, it is undeniable that the conventional plate-making printing apparatus has a decrease in printing efficiency.

Incidentally, in the one disclosed in Japanese Utility Model Laid-Open No. 59-169960, the plate making means and the printing means do not operate simultaneously, but the above-mentioned problems still remain.

The present invention has been made in view of the problems of the related art, and aims to improve printing efficiency by simultaneously performing a plate making operation and a printing operation.

(D) Means for Solving Problems The first invention is a plate making process for forming a document image on a stencil sheet, a storing process for temporarily storing the stencil sheet on which the document image is formed, and a downstream side of this process. In the plate-making printing method, which comprises the step of printing by mounting the stencil sheet on the plate cylinder, while printing using the stencil sheet after plate making which is located downstream in the moving direction of the stencil sheet. In addition, it is characterized in that the plate-making process and the printing process can be operated at the same time by making a plate on an unmade stencil sheet on the upstream side and transferring it to the storing process.

A second aspect of the invention is to mount a stencil sheet on the plate cylinder, a plate making means for forming an original image on the stencil sheet, a means for temporarily storing the stencil sheet on which the original image is formed, and a downstream side of the storing means. Printing means for printing, a means for controlling the rotation timing of the plate cylinder, a conveying roller that is interlocked with the plate making means and conveys the stencil sheet after plate making toward the storing means, and at the time of rotation of the plate cylinder. This is a plate-making printing apparatus provided with a control means for driving a conveying roller to simultaneously operate the plate-making means and the printing means.

(E) Operation In the present invention, means for controlling the rotation timing of the plate cylinder,
Since a conveying roller that is interlocked with the plate making means and conveys the stencil sheet after plate making toward the storing means, and a control means that can rotate the conveying roller when the plate cylinder is rotated, are provided.
It is possible to rotate the conveying roller and the plate cylinder at the same time and simultaneously operate the plate making means and the printing means. Therefore, while the preceding base paper is mounted on the plate cylinder and printing is performed, a document image is formed on the following base paper (plate-making), and the base paper after the plate-making is stored in the storage means to be in the print standby state. Become.

(F) Embodiment FIG. 1 is a block diagram showing the outline of one embodiment. In this figure, a plurality of originals (2) ...
The document placing table (3) on which is loaded is mounted. At the base of this document table (3), there are multiple documents (2)
Separation roller for supplying one by one from the bottom one ...
(4) and the paper feed roller (5) are provided opposite to each other. Both the separation roller (4) and the paper feed roller (5) are configured to rotate counterclockwise intermittently.

Photo sensors (6) and (6) for detecting the document (2) are provided on the downstream side of the paper feed roller (5).

On the downstream side of the photosensors (6) and (6), a first conveying roller for conveying the original (2) and a roll-shaped stencil sheet (hereinafter simply referred to as “stencil sheet”) (7) in an overlapping manner. (8) and (9) are provided. A one-way clutch is provided on the drive shaft of the first conveying rollers (8) (9), and these rollers (8) (9)
Conveyance force is applied only when the base paper (7) and the original (2) are conveyed, and is driven when the base paper (7) is conveyed by the grippers (24) and (32) described later. .

On the downstream side of the first conveying rollers (8) and (9), there is provided a cylindrical cutter (10) in which a slightly twisted blade is planted on the circumferential side of the rotary shaft, and the cutter (10) Thus, the roll-shaped base paper (7) is cut into a desired length dimension.

Although not shown, the cylindrical cutter (1
0) A fixed blade extending in parallel to the axial direction of the cutter (10) is provided at the lower part, and the cutter (10) rotates to allow the cutter (10) to have a slightly twisted blade and the fixed blade. The base paper (7) is sandwiched and cut in a direction orthogonal to the transport direction.

The first transport roller is provided on the downstream side of the cutter (10).
Second transport rollers (11) and (12) similar to (8) and (9) are provided.

On the downstream side of the second conveying rollers (11) (12), there is a base paper.
A plate making machine (13) for forming a document image is provided at (7). The plate making machine (13) includes a pressed plate (14) for holding the upper surface of the original (2), a transparent glass plate (15) for pressing the base paper (7) and the original (2) against the pressed plate (14), It comprises a flash lamp (16) mounted on the back surface of the transparent glass plate (15), and a pressure device (17) for raising both the transparent glass plate (15) and the flash lamp (16). The pressurizing device (17) is composed of an air cylinder, but may be composed of a motor and a cam.

On the downstream side of the plate making machine (13), there is a third conveyance roller (1
8) is provided and this third conveyance roller (18) is provided.
The peeling roller (20) is rotatably mounted on the free end of the swing lever (19). The angle formed by the tangent to the contact point between the third conveying roller (18) and the peeling roller (20) and the plane of the glass plate (15) makes it easy to peel the raw paper (7a) and the original (2). Therefore, it is set to about 60 °. In addition, the base paper after plate making (7a),
Display the base paper after printing in (7b).

A storage chamber (21) for temporarily storing the plate-making base paper (7a) on which the original image is formed is formed below the third conveying roller (18).

Further, on the downstream side of the third transport roller (18), a document guide plate (for discharging the document (2) peeled from the raw paper (7a) by the transport roller (18) and the peeling roller (20) ( 22) is provided.

The printing machine (23) includes a single cylinder plate cylinder (25) and this plate cylinder (2
A well-known press roller (2) that presses the printing paper (26) against the (5)
7) etc. A clamper (28) for holding the downstream side edge of the base paper (7a) is provided in the non-printing area of the plate cylinder (25), and the clamper (28) is the main body of the apparatus.
It is configured to be closed by a cam (29) provided in (1) and opened by a plate discharging machine (30) described later.
Since the structure of the plate cylinder (25) itself is the same as the conventionally known one, its description is omitted.

From the position where the cutter (10) is provided, the plate cylinder (25)
A pair of endless timing belts (31) and (31) are reciprocally movably stretched over the position where the downstream end of the base paper (7) is attached. A gripper composed of a lower support piece (24) and an upper tongue piece (32) is mounted for holding the edge (FIG. 2, FIG.
(See FIG. 3).

On the left side of the plate cylinder (25), there is provided a plate discharge machine (30) for opening the clamper (28) and separating the base paper (7b) after printing from the plate cylinder (25). There is. This plate discharge machine (30) includes means (not shown) for opening the clamper (28), a peeling claw (33) for peeling the base paper (7b) from the plate cylinder (25), and the peeled base paper (7b). ) Is stored in the base paper storage box (34), and is composed of a pair of gears (35) (36),
The base paper storage box (34) is attached to and detached from the apparatus body (1) in the horizontal direction.

A paper feed tray (37) and a paper feed roller (38), which are well known in the art, on which paper (26) before printing is stacked are provided at the lower left side of the apparatus main body (1), and the top paper (26 ) Are sequentially fed between the plate cylinder (25) and the press roller (27). In addition, on the lower right side of the device body (1), the printed paper (26)
A conveyor (39) for transporting the sheet and a sheet discharge tray (40) for stacking and storing the discharged sheets (26) are provided.

The apparatus of this embodiment is sequence-controlled by a microcomputer so that the plate making machine (13) and the printing machine (23) can operate simultaneously.

In addition, as shown in FIG. 4, the roll-shaped base paper (7) is
When forming a document image, flash timing marks (41) are attached at intervals corresponding to the length of the document image (first area) that can be formed by one flash of light.
The photo sensor (4) that detects this mark (41) ...
2) is provided. The flash timing marks (41) are printed in advance on the base paper (7) with an ink that does not contain carbon, but may be displayed with through holes.

Next, the operation of the apparatus of this embodiment will be mainly described with reference to FIGS.
It will be described with reference to the drawings and FIG. 5 (time chart).

The base paper (7) is preliminarily provided with first and second conveying rollers (8), (9) (1
1) (12) is slightly fed to the plate making machine (13) side, and the downstream end edge thereof is located at the second transport roller (11) (1
It is clamped by the grippers (32) and (24) at the downstream side (position A) of 2) and stopped. In this state, when the operator places a plurality of originals (2) on the original placing table (3) and then operates a start switch (not shown), the grippers (32) (24) While adhering the base paper (7), it advances in the downstream direction and stops at the upstream side (position B) of the plate cylinder (25).

At this time, the first and second conveying rollers (8) (9) (11) (1
2) is driven by the movement of the base paper (7).

When the grippers (32) (24) move forward, the peeling roller (20) moves to the third position up to the position (dotted line position in FIG. 1) that allows the grippers (32) (24) to pass. It is separated from the transport roller (18) and retracted.

At the same time that the base paper (7) starts to be fed, both the separation roller (4) and the paper feed roller (5) of the originals (2) are slightly rotated counterclockwise, and the lowermost original (2) ) Is separated. When the separated document (2) is detected by the photosensors (6) and (6), the separation roller (4) is fixed and the paper feed roller (5) is driven. The downstream side edge of 2) has already been fed between the first transport rollers (8) and (9). Therefore, the original (2) is conveyed together with it overlaid on the original (7). When the grippers (24) and (32) reach the position B, the downstream edge of the original (2) is transferred to the plate making machine. It is configured so as to be located on the downstream side of the transparent glass plate (15) of (13).

Also, at this time, the flash timing mark (41) of the base paper (7) is detected by the sensor (42), but at this time, no flash light is emitted and the base paper (7) and the original (2) are stopped. It's just

While the base paper (7) and original (2) are stopped,
The pressure device (17) of 3) operates and the transparent glass plate (15) rises, and the base paper (7) and the original (2) are sandwiched between the pressed plate (14) and the transparent glass plate (15). Is pressed. When the flash lamp (16) emits a flash light in this state, the flash image forms an original image on the first area (see FIG. 4) of the base paper (7). This image forming action is well known and will not be described.

When the formation of the original image of the first area is completed, the pressure device (17) moves backward and the transparent glass plate (15) descends, so that the base paper (7a) and the original (2) after plate making are not It becomes a pinching state.

Next, the swing lever (19) rotates and the peeling roller (20)
Is pressed against the third conveying roller (18), and the third conveying roller (18) starts rotating in the counterclockwise direction. At the same time, the first and second conveying rollers (8) (9) (11)
(12) also starts driven rotation.

Then, the original (2) and the raw paper (7a) are conveyed to the downstream side, and are sequentially peeled from the downstream edge portion by the peeling roller (20). Then, the original (2) is ejected upward along the guide plate (22), and the original paper (7a) is loosened and sequentially fed into the lower storage chamber (21).

When the base paper (7a) is conveyed to the downstream side, the second flash timing mark (41) becomes the sensor (42).
When it is detected by (42), that is, when the second area of the document (2) arrives on the transparent glass plate (15), the third conveying roller (18) is stopped and the driven roller is driven accordingly. The first and second conveying rollers (8), (9), (11), and (12) that are operating also stop.

After that, the same steps as above are repeatedly performed, and the base paper (7)
The original image is formed on the second area of the
Are sequentially stored in the storage chamber (21).

At this time, in order to prevent the non-image forming portion from being generated between the first area and the second area of the base paper (7), the conveyance size is controlled so that both areas slightly overlap each other. It In this way, when the original paper (7) is intermittently conveyed 6 times and the flash lamp (16) is flashed 6 times for one original (2), the whole area of the original paper (7 ), The original image is formed, and the plate making process is completed.
In this embodiment, the entire area of the original image is formed on the base paper (7) by six flashes, but the flash lamp (1
It is possible to reduce this number by increasing the size and output of 6).

In addition, the length of the original image formed by one flash is
Although it can be defined by the carrying size of the third carrying roller (18), in consideration of slippage and the like, the flash timing mark (41) formed in advance on the base paper (7) is set on the photosensors (42) (42). It is possible to more accurately convey the sheet by specifying the sheet conveyance size by performing the detection.

When the plate making operation is completed, the grippers (24) (32) further advance to the position (C position) immediately before the clamper (28) of the plate cylinder (25) to open the base paper (7a).

At the same time as the downstream edge of the base paper (7a) is released from the grippers (24) (32), the clamper (28) of the plate cylinder (25) is closed, and the edge is the plate cylinder (25). It is clamped by the clamper (28). At this time, the gripper (24) (32) may not be completely opened with the base paper (7a), and the gripping force with respect to the base paper (7a) may be weakened.

After that, the grippers (24) and (32) retreat to the position B with the base paper (7a) opened, and at the same time, the base paper (7) is cut by the cutter (10).

More specifically, as shown in FIG. 5, the cutter (10) rotates while the grippers (24) (32) after releasing the base paper (7a) return from the C position to the B position. The base paper (7a)
At the same time that the base paper (7a) is cut.
5) will start rotating.

Then, when the plate cylinder (25) rotates counterclockwise, the plate-making base paper (7) stored in the storage chamber (21) is pulled out and wound around the plate cylinder (25). Subsequently, two test prints are performed, and the preparation for printing is completed, but the time required up to this point is 25 seconds.

After that, a predetermined number of sheets are printed.

In this way, while the first original document (2) is being printed, the lever (19) rotates clockwise and the peeling roller (20) moves from the third conveying roller (18). Separate again,
Next, the timing tilts (31) (31) move back and the grippers (24) (32) return to their original positions (positions A). After the grippers (24) (32) are once opened, the first and second grippers are opened.
The transport rollers (8), (9), (11) and (12) are driven, and the downstream side edge of the second base paper (7) is inserted and gripped between the grippers (24) and (32). At this point, one cycle is completed, but the time required up to this point is 30 seconds after the start switch is operated.

Then, through the same steps as described above, the second original (2)
The original image of is formed on the base paper (7). That is, while the first original (2) is being printed, the original image of the second original (2) is formed on the original (7) and stored in the storage chamber (21).

When the printing of the predetermined number of sheets of the first original (2) is completed, the plate discharge machine (30) operates to print the original paper (7b).
Is stored in the raw paper storage box (34).

The plate discharge machine (30) may be operated immediately after the printing of the predetermined number of sheets is completed. Further, by appropriately selecting the sequence, when the next plate-making base paper (7a) is stored in the storage chamber (21), the step of storing the base paper (7b) in the storage box (34) and the next step It is also possible to continuously perform the step of winding the base paper (7a) around the plate cylinder (25).

Thus, while the second original (2) is being printed, the third
The original image of the second original (2) is formed on the original paper (7), and thereafter, the above steps are repeated until all the originals on the original placing table (3) are printed. Not the last manuscript
When the printing of (2) is started, the plate making machine (13) stops its operation.

As the plate making means, a dot printer or a thermal printer can be used in addition to the plate making machine (13) used in this embodiment. When such a dot printer is used, it is possible to directly print the output of the word processor.

(G) Effect of the Invention In the first invention, when a plurality of originals are sequentially printed, the succeeding originals are plate-formed while the preceding originals are being printed. Therefore, the plate-making time can be ignored depending on the number of printed sheets. It is not necessary to print after completion of plate making as in the conventional apparatus. Therefore, the total printing time can be shortened and the printing operation can be performed efficiently.

According to the second aspect of the present invention, the means for temporarily storing the stencil sheet on which the original image is formed, and the control means for simultaneously operating the plate making means and the printing means are provided. Since the original can be plate-made and temporarily stored in the temporary storage means, the total time can be shortened and the printing operation can be efficiently performed.

It is expected that demand for various types of small-quantity printing and demands for cost reduction and speeding up will increase more and more in recent years when various kinds of office automation equipment are installed in offices and the like. Thus, it becomes possible to sufficiently meet the demand and demand.

[Brief description of drawings]

Each of the drawings shows an embodiment of the present invention. Fig. 1 is a configuration diagram, Fig. 2 is a plan view of a gripper, Fig. 3 is a side view corresponding to Fig. 2, and Fig. 4 is a plan view of stencil paper. Figures and 5 are time charts. (1) …… Main unit, (2) …… Original, (7) (7a) (7b) ……
Stencil paper, (13) …… plate making machine, (21) …… storage chamber, (2
3) …… Printing machine.

Claims (2)

[Claims] 1. A plate making process for forming an original image on a stencil sheet,
A stencil printing method comprising a storage step of temporarily storing a stencil sheet on which an original image is formed, and a printing step downstream of this step of mounting the stencil sheet on a plate cylinder for printing. While printing using the stencil sheet after platemaking on the downstream side along with, plate-making on the stencil sheet of unmade plate on the upstream side and transfer to the storage process, the platemaking process and the printing process operate simultaneously A plate-making printing method characterized by being capable of performing. 2. A plate making means for forming an original image on a stencil sheet,
Means for temporarily storing the stencil sheet on which the original image is formed, printing means for printing by mounting the stencil sheet on the plate cylinder downstream of the storing means, and means for controlling the rotation timing of the plate cylinder And a conveying roller which is interlocked with the plate making means and conveys the stencil sheet after plate making toward the storing means, and a control means which drives the conveying roller when the plate cylinder rotates to operate the plate making means and the printing means at the same time. A plate-making and printing apparatus comprising: